Home / 81,787.48-122,681.07-25,631.89

Finding the Fourth Proportional to 81,787.48, 122,681.07 and 25,631.89

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Solution

The fourth proportional to 81,787.48, 122,681.07 and 25,631.89 is: 38,447.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,787.48 : 122,681.07 = 25,631.89 : x
  2. Step 2: Convert to fraction form
    81,787.48/122,681.07 = 25,631.89/x
  3. Step 3: Cross multiply
    81,787.48x = 122,681.07 × 25,631.89
  4. Step 4: Simplify right side
    81,787.48x = 3,144,547,691.32
  5. Step 5: Solve for x
    x = 3,144,547,691.32/81,787.48
  6. Step 6: Final answer
    x = 38,447.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.